There isn't much systemic risk if they're locking in their conversion rates with providers at the time of customer transaction. The risk is in the fee structure

There isn't much systemic risk if they're locking in their conversion rates with providers at the time of customer transaction. The risk is in the fee structure: will they attract enough customers to actually keep the lights on with that fee? I certainly hope so, because this is so great if it ends up working as advertised.